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McMillan USMC M40A3 SportLine Airsoft Sniper Rifle by ASG (Color: Black)

ID: 66940 (SR-ASG-50132)
4.6 stars, based on 46 reviews
McMillan USMC M40A3 SportLine Airsoft Sniper Rifle by ASG (Color: Black)
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Optic and bipod not included
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MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.


  • Fully licensed by McMillan Group International
  • Authentic 1:1 replica of the M40A3 fielded by USMC snipers
  • Aluminum barrel and receiver
  • High strength polymer stock
  • 20mm bipod rail (bipod sold separately)
  • Polymer 20rd magazine
  • 20mm optic rail
  • Smooth bolt and trigger pulls (Adjustable trigger pull and bolt stroke)

FPS Range: 410-420

Color: Black

The M40, known for its years of service in the hands of US Marines, began its life as a modified military type-classified version of the Remington M700 bolt action rifle. Later in its progression came the development of fiberglass A1 style stocks made by McMillan. The M40A3 began its development in the mid 90's and entered service in 2001 during Operation Enduring Freedom. Over its years of use the M40 has maintained a solid reputation for reliability and precision.

Length: 1130mm
Inner Barrel: 475mm
Weight: 3400g
Magazine Capacity: 20rds
Muzzle Velocity: 410-420 (Measured with 0.20g BBs)
Fire Modes: Single shot, safety
System: High power spring
Package Includes: Gun, Magazine, Manual
Hopup: Yes, Adjustable

Manufacturer: ASG (Licensed by McMillan Group International)

ASG Limited Manufacturer Warranty:

This Sportline airsoft gun is backed by a 9 month limited warranty from ActionSportGames. Should this airsoft gun fail due to a defect in material or workmanship during the warranty period, ActionSportGames will repair or replace it, free of charge. Please see the included warranty card for warranty details.

About ASG

ActionSportGames is a worldwide leader in the business of replica firearms and accessories manufacturing – including Airsoft guns, Airguns, CO2 guns and firearms replicas. We specialize in 1:1 scale replica guns and accessories for fun, action, sports, entertainment and collection. Today were proud to be recognized as the innovator and manufacturer of the CZ EVO3 A1 AEG and having introduced several Airsoft versions of this popular Airsoft gun to the market.One of our goals is to become the preferred supplier in the firearms replica business through worldwide license agreements, quality brands and premium service – before, during and after sales.

46 Customer Reviews

(Write a review)

by Korey G. on 01/05/2021
"I recommend this gun if you plan on upgrading and building it up. Great FPS right out of the box still works really well.
by marshallbonk b. on 11/25/2020
"Ok- I've had this gun for almost a year. It's performed admirably in winter and in summer, although it has the usual sniper problems. I R-hopped it successfully, and use .32s. I will be getting some .4s soon, so I'll see how those run. Right now I can hit a person at almost 300 feet. I've hit some 250 foot shots- my favorite was when it hit a tree and ricocheted into the person. I installed a m140? m150? spring, supposedly a 500 fps spring- got decent results with that, now I can push heavies at almost 430-450 fps. The spring has since smoothed down with use, but still gets decent power through. Rhop or flathop is really good for this gun's barrel- I'd recommend getting a PDI cold hammer forged barrel with really good tolerance, it's worth the money and smooths out your consistency when paired with a good bucking. The trigger unit I'd expect would last about 50k shots- I've put about 10k rounds through it already. I got this specifically for an impression kit as a USMC scout/sniper, and I'd recommend that you just get a JG bar 10 instead- more aftermarket. However- for my purposes, it serves me well and is compatible with enough aftermarket to make it shoot some 300 feet with ease. Mags are pretty decent, a lot of parts are plastic though and strip if you tighten ANY screw too much. Not too bad for the price I paid- 68 bucks on sale.
by Stuart B. on 11/18/2020
"So far I have had this gun for a couple of months, and it has held up great. This being my first sniper, I was skeptical on buying one of the higher end rifles just in case it wasn't my preferred style of play. When the package arrived, it was extremely easy to assemble out of the box and came with a speed loader (very helpful unless you want to hand feed each bb into the magazine), and a pack of 100 6mm .20g bbs. The rifle body is made out of a dense polymer that even though it is plastic, is tough and will stand up to a bit of wear. The barrel and picatinny rails are made of metal or aluminum. I first tried out shooting the bbs that came in the package. But after shooting some of the .20gs I decided to move it up some to .25g. These worked better seeing as they didn't blow off course as easily. The hop up is very easy to engage and simple to set according to the distance you are trying to shoot at. Also it is a plus that the system is compatible with most if not all VSR-10 systems which makes it easy to upgrade depending on how you want to customize it. The adjustable cheek rest is a really nice feature that the designers threw in there to add a slight customization element out of the box. I wish that it would have come with a scope and bipod like shown in the picture but there are some great ones for under $25 on amazon that I picked up. Soon I am going to be upgrading to one of the Novritsch ssg's but will be keeping this one just to have a backup. If you are a beginner at airsoft sniping I would really recommend this gun and even if you are more experienced seeing how easy it is to upgrade. For the price I really don't think that you can beat the value and accuracy of this rifle.

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